Lever-operating mechanism.



W. TAYLOR. LEVER OPERATING MECHANISM.

APPLICATION FILED APR. I8 1918.

1,276, l 33 Patented Aug 20, 1918.

UNITED sTATEs PATENT oEEicE.

WILLIAM TAYLOR, OF FORD CITY, ONTARIO, CANADA, ASSIGNOR TO W. A. CASE 6c SON MFGr COMPANY, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

LEVER-OPERATING MECHANISM.

To all rwhom t may concer/1L.'

Be itknown that I, ViLLIAM TAYLOR, a subject of the King of Grreat Britain and Ireland, residing at' Ford City, in the Province of Ontario and Dominion of Canada, have invented certain new and useful Improvements in Lever-Operating Mechanism, ofV which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to lever-operating mechanisms and relates particularly to mechanism acting through a lever to control the discharge valve of a flushing tank.

It is common to employ a valve-control ling lever actuable through a rock-arm to unseat the valve and returnable by gravity to its valve closing position. Such mechafnisms, however, are open to the objection that the lever will be restrained against yaccomplishing its return movement in case the actuating rockarm` is left in a dead center position, that is to say, substantially transverse of the lever, and under such con` ditions the iiushing tank will discharge continuously without filling.

To remedy this defect the invention contemplates mounting upon a rock-shaft members adapted to have actuating engagement with the lever at two points thereof, said members having the nature of rock-arms, one of which has engagement with the lever until adjacent its dead-center position, whereupon the other rock-arm engages the lever and completes the movement thereof.

In the drawings:

Figure 1 is a top view of the hereindescribed mechanism, sectionally showing the mounting thereof in the wall of a flushing tank;

Fig. 2 is a view in elevation of said mechanism as seen from the interior of said tank, the valve-opening and valve-closing position of the parts being respectively shown in full and dash lines.

Fig. 3 is a fragmentary interior view in elevation of a portion of the mechanism showing the position of the parts in a stage of the valve-opening operation slightly subsequent to that in which they are seen in full lines in Fig. 2, certain parts being broken away for the sake of clearness.

In these views 1 designates a iushing tank wall and 2 a valve for controlling the dis Specification of Letters Patent.

Patented Ang. 20, 1918.

Application filed April 18, 1918. Serial No. 229,256.

charge from said valve, said valve being carried by a stem 2a depending from one eX- tremity of a lever 3 pivoted at a point 4l relatively remote from said stem. At its other end the lever is provided with spaced pairs 5 and 6 of angularly intersecting cam faces, the pair 5 being formed upon the top edge of the lever and the pair 6 upon a lug 7 which projects laterally from the lever, Shifting of the lever 3 from its dash line position to its full line position, as shown in Fig. 2, is accomplished through the engagement with one of the cam faces 5 of a crank-pin 8 carried by a crank-arm 9. It will be noted that in said shifted position of the lever the arm 9 is approaching a dead-` center position. lVhen the rock-arm 9 is turned further in the direction of the arrow (see Fig. 2) the lever is disengaged from the crank-pin 8, owing to engagement of a rockarm 10 projecting rigidly from the pin 8, with the lug 7. The free end ofthe arm 10 is formed with angularly intersecting cam faces 11, one of which will engage a cor* responding cam face 6 of the lug 7 according to the direction to which the arm 9 is rotated. Similarly either cam face 5 of the lever may be engaged by the crankpin 8 according to the direction in which the arm 9 is rotated. Said arm is carried by a rock-shaft 12 journaled in a bushing 13 passing through the wall 1, an actuating handle 111 being mounted upon said rockshaft eXteriorly of the flushing tank. Preferably there will be formed integral with the'arm 10 a linger 15 which projects with reference to the pin 8 in an opposite direction to the yarm 10 and acts in alternation with said arm to restrain the lever 3 against displacement longitudinally of its pivot pin 4. An engagement between the arm 10 and the lug 7 takes place only duringk the period that the arm 9 is passing through its deadcenter position. After the apices of the cam faces 6 and 11 have passed each other, return motion of the lever (under the inliuence of gravity) begins and one or other of the cam faces 5 acts upon the crank-pin 8 to rock the arm 9 and the shaft 12 until the former assumes the position indicated in dash lines in Fig. 2. It will be noted that there can be no dead-center engagement between the arm 10 and lug 7, since it is not possible to balance the apices of the faces G and 11 upon each other. 'The dead center position of the parts 1s best shown in Fig. 3.

From the foregoing it will be seen that provision is made for actuating the lever to its valve-opening position through rotation of the shaft 12 in either direction and that the actuating mechanism is such as to insure a return of the lever to its valve-closing position without material opposition from the actuating mechanism.

lVhat I claim as my invention is l. A lever-operating mechanism comprising a rock-shaft, an arm upon said shaft engageable with the lever to rock the same when said shaft is rocked, and means carried by the rock-shaft supplemental to said arm to rock the lever out of engagement with said arm when the latter is passing through a dead-center position.

2. A lever-operating mechanism comprising a rock-shaft, an arm upon said rocksliaft, a lever with Which said arm is engageablc to rock the same when said shaft is rocked, and a supplemental arm projecting from the first-mentioned arm to rock the lever out of engagement with the firstmentioned arm When the latter is passing through a dead-center position. 4

3. A lever-operating mechanism comprising a. rock-shaft, an arm carried by said shaft, al crank-pin upon said arm, a lever with Which said crank-pin is engageable to rock the lever when said rock-shaft is Copies of this patent may be obtained for tive cents each, by addressing the turned, and a supplemental arm projecting from said crank-pin engageable with the lever to rock the same out of engagement with the first-mentioned arm when the latter is passing through a dead-center position.

4. In a lever-operating mechanism, the combination with a rock-shaft, of an arm carried thereby having a pair of angularly .intersecting cam faces with either of which the arm is engageable according to direction of rotation of said shaft to rock the lever, and means carried by said shaft supplemental to said arm for disengaging the lever from the arm when the latter is passing through a dead-center position.

A lever-operatingmechanism comprising a rock-shaft, an arm carried by said shaft7 a lever having a pair of angularly intersecting cam faces respectively engageable by said arm according to the direction of rotation of said shaft for rocking said lever, and having a second pair of singularly intersecting cam faces spaced from the first pair, and a Second arm extending from the first-mentioned arm having a pair of angularly intersecting faces respectively engageable With the last-mentioned cam faces of the lever according to the direction of rotation of the rock-shaft and acting to disengage the lever from the first-mentioned arm when the same' ispassing through a dead-center position.

In testimony whereof I affix my signature.

WILLIAM TAYLOR.

"Commissioner of Patenti,

Washington, D. C. 

